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-rw-r--r--src/mesa/state_tracker/st_cb_fbo.c664
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diff --git a/src/mesa/state_tracker/st_cb_fbo.c b/src/mesa/state_tracker/st_cb_fbo.c
new file mode 100644
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+/**************************************************************************
+ *
+ * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
+ * All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sub license, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the
+ * next paragraph) shall be included in all copies or substantial portions
+ * of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
+ * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
+ * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+ * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+ * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ *
+ **************************************************************************/
+
+
+/**
+ * Framebuffer/renderbuffer functions.
+ *
+ * \author Brian Paul
+ */
+
+
+#include "main/imports.h"
+#include "main/context.h"
+#include "main/fbobject.h"
+#include "main/framebuffer.h"
+#include "main/renderbuffer.h"
+
+#include "pipe/p_context.h"
+#include "pipe/p_defines.h"
+#include "pipe/p_screen.h"
+#include "st_context.h"
+#include "st_cb_fbo.h"
+#include "st_cb_texture.h"
+#include "st_format.h"
+#include "st_public.h"
+#include "st_texture.h"
+
+
+
+/**
+ * Compute the renderbuffer's Red/Green/EtcBit fields from the pipe format.
+ */
+static int
+init_renderbuffer_bits(struct st_renderbuffer *strb,
+ enum pipe_format pipeFormat)
+{
+ struct pipe_format_info info;
+
+ if (!st_get_format_info( pipeFormat, &info )) {
+ assert( 0 );
+ }
+
+ strb->Base._ActualFormat = info.base_format;
+ strb->Base.RedBits = info.red_bits;
+ strb->Base.GreenBits = info.green_bits;
+ strb->Base.BlueBits = info.blue_bits;
+ strb->Base.AlphaBits = info.alpha_bits;
+ strb->Base.DepthBits = info.depth_bits;
+ strb->Base.StencilBits = info.stencil_bits;
+ strb->Base.DataType = st_format_datatype(pipeFormat);
+
+ return info.size;
+}
+
+/**
+ * gl_renderbuffer::AllocStorage()
+ * This is called to allocate the original drawing surface, and
+ * during window resize.
+ */
+static GLboolean
+st_renderbuffer_alloc_storage(GLcontext * ctx, struct gl_renderbuffer *rb,
+ GLenum internalFormat,
+ GLuint width, GLuint height)
+{
+ struct pipe_context *pipe = ctx->st->pipe;
+ struct st_renderbuffer *strb = st_renderbuffer(rb);
+ enum pipe_format format;
+
+ if (strb->format != PIPE_FORMAT_NONE)
+ format = strb->format;
+ else
+ format = st_choose_renderbuffer_format(pipe, internalFormat);
+
+ /* init renderbuffer fields */
+ strb->Base.Width = width;
+ strb->Base.Height = height;
+ init_renderbuffer_bits(strb, format);
+
+ strb->defined = GL_FALSE; /* undefined contents now */
+
+ if(strb->software) {
+ struct pipe_format_block block;
+ size_t size;
+
+ _mesa_free(strb->data);
+
+ assert(strb->format != PIPE_FORMAT_NONE);
+ pf_get_block(strb->format, &block);
+
+ strb->stride = pf_get_stride(&block, width);
+ size = pf_get_2d_size(&block, strb->stride, height);
+
+ strb->data = _mesa_malloc(size);
+
+ return strb->data != NULL;
+ }
+ else {
+ struct pipe_texture template;
+ unsigned surface_usage;
+
+ /* Free the old surface and texture
+ */
+ pipe_surface_reference( &strb->surface, NULL );
+ pipe_texture_reference( &strb->texture, NULL );
+
+ /* Setup new texture template.
+ */
+ memset(&template, 0, sizeof(template));
+ template.target = PIPE_TEXTURE_2D;
+ template.format = format;
+ pf_get_block(format, &template.block);
+ template.width[0] = width;
+ template.height[0] = height;
+ template.depth[0] = 1;
+ template.last_level = 0;
+ template.nr_samples = rb->NumSamples;
+ if (pf_is_depth_stencil(format)) {
+ template.tex_usage = PIPE_TEXTURE_USAGE_DEPTH_STENCIL;
+ }
+ else {
+ template.tex_usage = (PIPE_TEXTURE_USAGE_DISPLAY_TARGET |
+ PIPE_TEXTURE_USAGE_RENDER_TARGET);
+ }
+
+ /* Probably need dedicated flags for surface usage too:
+ */
+ surface_usage = (PIPE_BUFFER_USAGE_GPU_READ |
+ PIPE_BUFFER_USAGE_GPU_WRITE);
+#if 0
+ PIPE_BUFFER_USAGE_CPU_READ |
+ PIPE_BUFFER_USAGE_CPU_WRITE);
+#endif
+
+ strb->texture = pipe->screen->texture_create( pipe->screen,
+ &template );
+
+ if (!strb->texture)
+ return FALSE;
+
+ strb->surface = pipe->screen->get_tex_surface( pipe->screen,
+ strb->texture,
+ 0, 0, 0,
+ surface_usage );
+
+ assert(strb->surface->texture);
+ assert(strb->surface->format);
+ assert(strb->surface->width == width);
+ assert(strb->surface->height == height);
+
+
+ return strb->surface != NULL;
+ }
+}
+
+
+/**
+ * gl_renderbuffer::Delete()
+ */
+static void
+st_renderbuffer_delete(struct gl_renderbuffer *rb)
+{
+ struct st_renderbuffer *strb = st_renderbuffer(rb);
+ ASSERT(strb);
+ pipe_surface_reference(&strb->surface, NULL);
+ pipe_texture_reference(&strb->texture, NULL);
+ _mesa_free(strb->data);
+ _mesa_free(strb);
+}
+
+
+/**
+ * gl_renderbuffer::GetPointer()
+ */
+static void *
+null_get_pointer(GLcontext * ctx, struct gl_renderbuffer *rb,
+ GLint x, GLint y)
+{
+ /* By returning NULL we force all software rendering to go through
+ * the span routines.
+ */
+#if 0
+ assert(0); /* Should never get called with softpipe */
+#endif
+ return NULL;
+}
+
+
+/**
+ * Called via ctx->Driver.NewFramebuffer()
+ */
+static struct gl_framebuffer *
+st_new_framebuffer(GLcontext *ctx, GLuint name)
+{
+ /* XXX not sure we need to subclass gl_framebuffer for pipe */
+ return _mesa_new_framebuffer(ctx, name);
+}
+
+
+/**
+ * Called via ctx->Driver.NewRenderbuffer()
+ */
+static struct gl_renderbuffer *
+st_new_renderbuffer(GLcontext *ctx, GLuint name)
+{
+ struct st_renderbuffer *strb = ST_CALLOC_STRUCT(st_renderbuffer);
+ if (strb) {
+ _mesa_init_renderbuffer(&strb->Base, name);
+ strb->Base.Delete = st_renderbuffer_delete;
+ strb->Base.AllocStorage = st_renderbuffer_alloc_storage;
+ strb->Base.GetPointer = null_get_pointer;
+ strb->format = PIPE_FORMAT_NONE;
+ return &strb->Base;
+ }
+ return NULL;
+}
+
+
+/**
+ * Allocate a renderbuffer for a an on-screen window (not a user-created
+ * renderbuffer). The window system code determines the format.
+ */
+struct gl_renderbuffer *
+st_new_renderbuffer_fb(enum pipe_format format, int samples, boolean sw)
+{
+ struct st_renderbuffer *strb;
+
+ strb = ST_CALLOC_STRUCT(st_renderbuffer);
+ if (!strb) {
+ _mesa_error(NULL, GL_OUT_OF_MEMORY, "creating renderbuffer");
+ return NULL;
+ }
+
+ _mesa_init_renderbuffer(&strb->Base, 0);
+ strb->Base.ClassID = 0x4242; /* just a unique value */
+ strb->Base.NumSamples = samples;
+ strb->format = format;
+ strb->software = sw;
+
+ switch (format) {
+ case PIPE_FORMAT_A8R8G8B8_UNORM:
+ case PIPE_FORMAT_B8G8R8A8_UNORM:
+ case PIPE_FORMAT_X8R8G8B8_UNORM:
+ case PIPE_FORMAT_B8G8R8X8_UNORM:
+ case PIPE_FORMAT_A1R5G5B5_UNORM:
+ case PIPE_FORMAT_A4R4G4B4_UNORM:
+ case PIPE_FORMAT_R5G6B5_UNORM:
+ strb->Base.InternalFormat = GL_RGBA;
+ strb->Base._BaseFormat = GL_RGBA;
+ break;
+ case PIPE_FORMAT_Z16_UNORM:
+ strb->Base.InternalFormat = GL_DEPTH_COMPONENT16;
+ strb->Base._BaseFormat = GL_DEPTH_COMPONENT;
+ break;
+ case PIPE_FORMAT_Z32_UNORM:
+ strb->Base.InternalFormat = GL_DEPTH_COMPONENT32;
+ strb->Base._BaseFormat = GL_DEPTH_COMPONENT;
+ break;
+ case PIPE_FORMAT_S8Z24_UNORM:
+ case PIPE_FORMAT_Z24S8_UNORM:
+ case PIPE_FORMAT_X8Z24_UNORM:
+ case PIPE_FORMAT_Z24X8_UNORM:
+ strb->Base.InternalFormat = GL_DEPTH24_STENCIL8_EXT;
+ strb->Base._BaseFormat = GL_DEPTH_STENCIL_EXT;
+ break;
+ case PIPE_FORMAT_S8_UNORM:
+ strb->Base.InternalFormat = GL_STENCIL_INDEX8_EXT;
+ strb->Base._BaseFormat = GL_STENCIL_INDEX;
+ break;
+ case PIPE_FORMAT_R16G16B16A16_SNORM:
+ strb->Base.InternalFormat = GL_RGBA16;
+ strb->Base._BaseFormat = GL_RGBA;
+ break;
+ default:
+ _mesa_problem(NULL,
+ "Unexpected format in st_new_renderbuffer_fb");
+ return NULL;
+ }
+
+ /* st-specific methods */
+ strb->Base.Delete = st_renderbuffer_delete;
+ strb->Base.AllocStorage = st_renderbuffer_alloc_storage;
+ strb->Base.GetPointer = null_get_pointer;
+
+ /* surface is allocated in st_renderbuffer_alloc_storage() */
+ strb->surface = NULL;
+
+ return &strb->Base;
+}
+
+
+
+
+/**
+ * Called via ctx->Driver.BindFramebufferEXT().
+ */
+static void
+st_bind_framebuffer(GLcontext *ctx, GLenum target,
+ struct gl_framebuffer *fb, struct gl_framebuffer *fbread)
+{
+
+}
+
+/**
+ * Called by ctx->Driver.FramebufferRenderbuffer
+ */
+static void
+st_framebuffer_renderbuffer(GLcontext *ctx,
+ struct gl_framebuffer *fb,
+ GLenum attachment,
+ struct gl_renderbuffer *rb)
+{
+ /* XXX no need for derivation? */
+ _mesa_framebuffer_renderbuffer(ctx, fb, attachment, rb);
+}
+
+
+/**
+ * Called by ctx->Driver.RenderTexture
+ */
+static void
+st_render_texture(GLcontext *ctx,
+ struct gl_framebuffer *fb,
+ struct gl_renderbuffer_attachment *att)
+{
+ struct pipe_screen *screen = ctx->st->pipe->screen;
+ struct st_renderbuffer *strb;
+ struct gl_renderbuffer *rb;
+ struct pipe_texture *pt = st_get_texobj_texture(att->Texture);
+ struct st_texture_object *stObj;
+ const struct gl_texture_image *texImage =
+ att->Texture->Image[att->CubeMapFace][att->TextureLevel];
+
+ if (!pt)
+ return;
+
+ /* create new renderbuffer which wraps the texture image */
+ rb = st_new_renderbuffer(ctx, 0);
+ if (!rb) {
+ _mesa_error(ctx, GL_OUT_OF_MEMORY, "glFramebufferTexture()");
+ return;
+ }
+
+ _mesa_reference_renderbuffer(&att->Renderbuffer, rb);
+ assert(rb->RefCount == 1);
+ rb->AllocStorage = NULL; /* should not get called */
+ strb = st_renderbuffer(rb);
+
+ assert(strb->Base.RefCount > 0);
+
+ /* get the texture for the texture object */
+ stObj = st_texture_object(att->Texture);
+
+ /* point renderbuffer at texobject */
+ strb->rtt = stObj;
+ strb->rtt_level = att->TextureLevel;
+ strb->rtt_face = att->CubeMapFace;
+ strb->rtt_slice = att->Zoffset;
+
+ rb->Width = texImage->Width2;
+ rb->Height = texImage->Height2;
+ /*printf("***** render to texture level %d: %d x %d\n", att->TextureLevel, rb->Width, rb->Height);*/
+
+ /*printf("***** pipe texture %d x %d\n", pt->width[0], pt->height[0]);*/
+
+ pipe_texture_reference( &strb->texture, pt );
+
+ pipe_surface_reference(&strb->surface, NULL);
+
+ /* new surface for rendering into the texture */
+ strb->surface = screen->get_tex_surface(screen,
+ strb->texture,
+ strb->rtt_face,
+ strb->rtt_level,
+ strb->rtt_slice,
+ PIPE_BUFFER_USAGE_GPU_READ |
+ PIPE_BUFFER_USAGE_GPU_WRITE);
+
+ init_renderbuffer_bits(strb, pt->format);
+
+ /*
+ printf("RENDER TO TEXTURE obj=%p pt=%p surf=%p %d x %d\n",
+ att->Texture, pt, strb->surface, rb->Width, rb->Height);
+ */
+
+ /* Invalidate buffer state so that the pipe's framebuffer state
+ * gets updated.
+ * That's where the new renderbuffer (which we just created) gets
+ * passed to the pipe as a (color/depth) render target.
+ */
+ st_invalidate_state(ctx, _NEW_BUFFERS);
+}
+
+
+/**
+ * Called via ctx->Driver.FinishRenderTexture.
+ */
+static void
+st_finish_render_texture(GLcontext *ctx,
+ struct gl_renderbuffer_attachment *att)
+{
+ struct st_renderbuffer *strb = st_renderbuffer(att->Renderbuffer);
+
+ if (!strb)
+ return;
+
+ st_flush( ctx->st, PIPE_FLUSH_RENDER_CACHE, NULL );
+
+ if (strb->surface)
+ pipe_surface_reference( &strb->surface, NULL );
+
+ strb->rtt = NULL;
+
+ /*
+ printf("FINISH RENDER TO TEXTURE surf=%p\n", strb->surface);
+ */
+
+ _mesa_reference_renderbuffer(&att->Renderbuffer, NULL);
+
+ /* restore previous framebuffer state */
+ st_invalidate_state(ctx, _NEW_BUFFERS);
+}
+
+
+/**
+ * Validate a renderbuffer attachment for a particular usage.
+ */
+
+static GLboolean
+st_validate_attachment(struct pipe_screen *screen,
+ const struct gl_renderbuffer_attachment *att,
+ GLuint usage)
+{
+ const struct st_texture_object *stObj =
+ st_texture_object(att->Texture);
+
+ /**
+ * Only validate texture attachments for now, since
+ * st_renderbuffer_alloc_storage makes sure that
+ * the format is supported.
+ */
+
+ if (att->Type != GL_TEXTURE)
+ return GL_TRUE;
+
+ if (!stObj)
+ return GL_FALSE;
+
+ return screen->is_format_supported(screen, stObj->pt->format,
+ PIPE_TEXTURE_2D,
+ usage, 0);
+}
+
+/**
+ * Check that the framebuffer configuration is valid in terms of what
+ * the driver can support.
+ *
+ * For Gallium we only supports combined Z+stencil, not separate buffers.
+ */
+static void
+st_validate_framebuffer(GLcontext *ctx, struct gl_framebuffer *fb)
+{
+ struct pipe_screen *screen = ctx->st->pipe->screen;
+ const struct gl_renderbuffer *depthRb =
+ fb->Attachment[BUFFER_DEPTH].Renderbuffer;
+ const struct gl_renderbuffer *stencilRb =
+ fb->Attachment[BUFFER_STENCIL].Renderbuffer;
+ GLuint i;
+
+ if (stencilRb && depthRb && stencilRb != depthRb) {
+ fb->_Status = GL_FRAMEBUFFER_UNSUPPORTED_EXT;
+ return;
+ }
+
+ if (!st_validate_attachment(screen,
+ &fb->Attachment[BUFFER_DEPTH],
+ PIPE_TEXTURE_USAGE_DEPTH_STENCIL)) {
+ fb->_Status = GL_FRAMEBUFFER_UNSUPPORTED_EXT;
+ return;
+ }
+ if (!st_validate_attachment(screen,
+ &fb->Attachment[BUFFER_STENCIL],
+ PIPE_TEXTURE_USAGE_DEPTH_STENCIL)) {
+ fb->_Status = GL_FRAMEBUFFER_UNSUPPORTED_EXT;
+ return;
+ }
+ for (i = 0; i < ctx->Const.MaxColorAttachments; i++) {
+ if (!st_validate_attachment(screen,
+ &fb->Attachment[BUFFER_COLOR0 + i],
+ PIPE_TEXTURE_USAGE_RENDER_TARGET)) {
+ fb->_Status = GL_FRAMEBUFFER_UNSUPPORTED_EXT;
+ return;
+ }
+ }
+}
+
+
+/**
+ * Copy back color buffer to front color buffer.
+ */
+static void
+copy_back_to_front(struct st_context *st,
+ struct gl_framebuffer *fb,
+ gl_buffer_index frontIndex,
+ gl_buffer_index backIndex)
+
+{
+ struct st_framebuffer *stfb = (struct st_framebuffer *) fb;
+ struct pipe_surface *surf_front, *surf_back;
+
+ (void) st_get_framebuffer_surface(stfb, frontIndex, &surf_front);
+ (void) st_get_framebuffer_surface(stfb, backIndex, &surf_back);
+
+ if (surf_front && surf_back) {
+ st->pipe->surface_copy(st->pipe,
+ surf_front, 0, 0, /* dest */
+ surf_back, 0, 0, /* src */
+ fb->Width, fb->Height);
+ }
+}
+
+
+/**
+ * Check if we're drawing into, or read from, a front color buffer. If the
+ * front buffer is missing, create it now.
+ *
+ * The back color buffer must exist since we'll use its format/samples info
+ * for creating the front buffer.
+ *
+ * \param frontIndex either BUFFER_FRONT_LEFT or BUFFER_FRONT_RIGHT
+ * \param backIndex either BUFFER_BACK_LEFT or BUFFER_BACK_RIGHT
+ */
+static void
+check_create_front_buffer(GLcontext *ctx, struct gl_framebuffer *fb,
+ gl_buffer_index frontIndex,
+ gl_buffer_index backIndex)
+{
+ if (fb->Attachment[frontIndex].Renderbuffer == NULL) {
+ GLboolean create = GL_FALSE;
+
+ /* check if drawing to or reading from front buffer */
+ if (fb->_ColorReadBufferIndex == frontIndex) {
+ create = GL_TRUE;
+ }
+ else {
+ GLuint b;
+ for (b = 0; b < fb->_NumColorDrawBuffers; b++) {
+ if (fb->_ColorDrawBufferIndexes[b] == frontIndex) {
+ create = GL_TRUE;
+ break;
+ }
+ }
+ }
+
+ if (create) {
+ struct st_renderbuffer *back;
+ struct gl_renderbuffer *front;
+ enum pipe_format colorFormat;
+ uint samples;
+
+ if (0)
+ _mesa_debug(ctx, "Allocate new front buffer\n");
+
+ /* get back renderbuffer info */
+ back = st_renderbuffer(fb->Attachment[backIndex].Renderbuffer);
+ colorFormat = back->format;
+ samples = back->Base.NumSamples;
+
+ /* create front renderbuffer */
+ front = st_new_renderbuffer_fb(colorFormat, samples, FALSE);
+ _mesa_add_renderbuffer(fb, frontIndex, front);
+
+ /* alloc texture/surface for new front buffer */
+ front->AllocStorage(ctx, front, front->InternalFormat,
+ fb->Width, fb->Height);
+
+ /* initialize the front color buffer contents by copying
+ * the back buffer.
+ */
+ copy_back_to_front(ctx->st, fb, frontIndex, backIndex);
+ }
+ }
+}
+
+
+/**
+ * If front left/right color buffers are missing, create them now.
+ */
+static void
+check_create_front_buffers(GLcontext *ctx, struct gl_framebuffer *fb)
+{
+ /* check if we need to create the front left buffer now */
+ check_create_front_buffer(ctx, fb, BUFFER_FRONT_LEFT, BUFFER_BACK_LEFT);
+
+ if (fb->Visual.stereoMode) {
+ check_create_front_buffer(ctx, fb, BUFFER_FRONT_RIGHT, BUFFER_BACK_RIGHT);
+ }
+
+ st_invalidate_state(ctx, _NEW_BUFFERS);
+}
+
+
+/**
+ * Called via glDrawBuffer.
+ */
+static void
+st_DrawBuffers(GLcontext *ctx, GLsizei count, const GLenum *buffers)
+{
+ (void) count;
+ (void) buffers;
+ check_create_front_buffers(ctx, ctx->DrawBuffer);
+}
+
+
+/**
+ * Called via glReadBuffer.
+ */
+static void
+st_ReadBuffer(GLcontext *ctx, GLenum buffer)
+{
+ (void) buffer;
+ check_create_front_buffers(ctx, ctx->ReadBuffer);
+}
+
+
+void st_init_fbo_functions(struct dd_function_table *functions)
+{
+ functions->NewFramebuffer = st_new_framebuffer;
+ functions->NewRenderbuffer = st_new_renderbuffer;
+ functions->BindFramebuffer = st_bind_framebuffer;
+ functions->FramebufferRenderbuffer = st_framebuffer_renderbuffer;
+ functions->RenderTexture = st_render_texture;
+ functions->FinishRenderTexture = st_finish_render_texture;
+ functions->ValidateFramebuffer = st_validate_framebuffer;
+ /* no longer needed by core Mesa, drivers handle resizes...
+ functions->ResizeBuffers = st_resize_buffers;
+ */
+
+ functions->DrawBuffers = st_DrawBuffers;
+ functions->ReadBuffer = st_ReadBuffer;
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-06-04 22:20:23 +0000